Thrawn's Revenge is a large-scale mod for Empire at War: Forces of Corruption. It includes the events of the Galactic Civil War after Palpatine's death at Endor, up until the signing of the Pellaeon-Gavrisom treaty.
If you own the Steam version of EaW, you will have to complete extra steps to run the mod after installation. Please see the manual for these steps.

yup, the Assault Frigate MK1 is a stripped down version of a dreadnaught, designed to increase its speed and cut down on crew requirements, obviously because during the Rebellion's first years they were kinda short on staff. its hull armor is weak but a lot of its armor was removed, but the Rebels tried to compensate for this by adding as much shield strength as the could to a ship of its size